公开(公告)号：US07363013B2

公开(公告)日：2008-04-22

申请号：US10693962

申请日：2003-10-28

申请人： Chang-Fu Kuo ,  Ling-Wei Ke ,  Jen-Chiou Bo ,  Shou-Tsung Wang ,  Kuang-Kai Teng

发明人： Chang-Fu Kuo ,  Ling-Wei Ke ,  Jen-Chiou Bo ,  Shou-Tsung Wang ,  Kuang-Kai Teng

IPC分类号： H04B1/04

CPC分类号： H03C3/0983 ,  H03C3/0925 ,  H03C3/0933 ,  H03C3/0941 ,  H03C3/0966

摘要： A phase lock loop receives a baseband signal which has an input frequency, and modulating the baseband signal to be a corresponding RF signal which has a predetermined transmission frequency for transmitting. The phase lock loop comprises a programmable divider, a modulator, a phase detector, a charging pump, a loop filter, a voltage-controlled oscillator and a frequency converter. The programmable divider divides the frequency of a local oscillating signal by a programmable divisor to generate a reference signal. The modulator receives the baseband signal, modulates the frequency of the reference signal according to the baseband signal, and generates a corresponding first comparison signal. The frequency converter receives the feedback RF signal and the local oscillating signal and outputs the second comparison signal according to the frequency difference. The divisor of the divider is programmable to avoid the spur frequency being generated because the local oscillating signal is interfered.

摘要翻译： 锁相环接收具有输入频率的基带信号，并且将基带信号调制为具有用于发送的预定发送频率的对应的RF信号。 锁相环包括可编程分频器，调制器，相位检测器，充电泵，环路滤波器，压控振荡器和变频器。 可编程分频器通过可编程除数器对本地振荡信号的频率进行分频，以产生参考信号。 调制器接收基带信号，根据基带信号调制参考信号的频率，并产生相应的第一比较信号。 变频器接收反馈RF信号和本地振荡信号，并根据频率差输出第二比较信号。 除法器的除数是可编程的，以避免由于本地振荡信号的干扰而产生的杂散频率。